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一、矿区自然条件韩城矿务局位于陕西省中部,黄河西岸的历史古城韩城市。矿区面积1120km~2,予测总储量102.9亿吨,煤种有焦煤、瘦煤、贫煤和无烟煤,煤层赋存稳定,地质构造简单,适于现代化技术开采。全局现有5个生产矿井,设计能力441万吨,核定能力432万吨。现有回采面20个,其中综采5套,综掘2套。近年来,每年生产原煤380万吨,掘进进尺3.5万米左右,规划在21世纪初期矿区总能力达到800万吨以上。目前井田开采范围都在东翼浅部,煤系地层受构造影响严重,断层多,岩层起伏变化大,结构不完整,强度低,多为砂岩,抗压强度38～50MPa,开掘巷道后,周边松动,易于变形。含煤地层为石炭二迭纪,共有可采煤层4层,其中2~#为薄煤层,其余均为厚煤层和中厚煤层,层间距均在15m 左右,11~#煤和5~#煤间距50m 以上。煤层顶板为粉砂和砂页岩,底板为泥岩或砂泥岩,煤层上部有两个含
I. Natural Conditions of Mining Area Hancheng Mining Bureau is located in Hancheng, a historical city in the middle of Shaanxi Province and the west bank of the Yellow River. The area of the mining area is 1120km ~ 2, with a total reserve of 10.29billion tons to be measured. Coal has coking coal, lean coal, lean coal and anthracite coal. The coal seam is stable and has simple geological structure and is suitable for the exploitation of modern technology. The existing global five production mines, design capacity of 4.41 million tons, approved capacity of 4.32 million tons. The existing mining face 20, of which 5 sets of fully mechanized mining, comprehensive mining 2 sets. In recent years, the annual production of 3.8 million tons of raw coal, tunneling footage of about 35,000 meters, planning the total capacity of the mining area in the early 21st century reached more than 8 million tons. At present, the mining area of the minefield is in the shallow part of the east wing. The coal measures strata are seriously affected by the tectonics. There are many faults, the rock layers fluctuate greatly, the structures are incomplete and the strength is low, mostly sandstone. The compressive strength is 38 ~ 50MPa. After excavating the roadway, Loose, easy to deform. The coal-bearing strata are Carboniferous and Permian. There are 4 layers of coal seam that can be exploited, of which 2 ~ # are thin coal seams, and the rest are thick and medium thick coal seams with interlamellar spacing of 15m, 11 ~ # coal and 5 ~ Coal spacing above 50m. The roof of coal seam is silt and sand shale, the bottom is mudstone or sandstone and mudstone, the upper part of coal seam contains two